msmtp is an SMTP client. In the default mode, msmtp transmits a mail to
an SMTP server which does the delivery.

Features include:
o SMTP authentication methods PLAIN, LOGIN and CRAM-MD5
o TLS encrypted connections
o DSN (Delivery Status Notification) support
o RMQS (Remote Message Queue Starting) support (ETRN keyword)
o PIPELINING support for increased transmission speed
o IPv6 support
o support for multiple accounts
o sendmail compatible interface (command line options and exit codes)
o support for Internationalized Domain Names (IDN)
